Bergmann’s rule is a scientific principle stating that animals in high-latitude, cooler climates tend to be larger than close relatives living in warmer climates. A pair of adult Nanuqsaurus tyrannosaurs, standing in the background, and pachyrhinosaurus, skull in the foreground, were among the dinosaur species included in the study that calls into question Bergmann’s rule. Image credit: James Havens. “Our study shows that the evolution of diverse...
